There was one answer in this other thread that directly spoke to my question: "wobble-less" spiders can produce trainwrecks and trainwrecks can produce "wobble-less" spiders." http://ball-pythons.net/forums/showt...=1#post2315463
Owal's summary was also very helpful and made same kinds of statments: http://www.owalreptiles.com/issues.php. "Breeding a low wobble Wobbler can result in some offspring with a bad wobble. Breeding a Wobbler with a bad wobble can result in low wobble offspring."
Here's a summary of other statements made there that might help others:
- all spiders have it
- it can be minor or severe
- it can change during the age of the snake
- it can be worse with stress; and perhaps improved with different conditions
- it can be worse at temps hotter than 88
- it's a matter of opinion: some people like it and some can't stand it
- it cannot be bred out; as evidence basically no one breeds spider x spider b/c homo. spider is considered lethal